B1- gp800/1200 (r)

[showmepro1200]

Is it possible to transplant a GP 800 or 1200 engine with or without the powervalves into a B1? if so how much work is involved and is there a lot to gain in doing this modification? would the weight of eaither of these engines be too much for the B1 body and just weight it down, or would the body with hold this weight? this is just a tenative idea and just want to know if it's possible, possibly a winter project????

 

[blaster800]

here ya go ! http://www.pwctoday.com/showthread.php?t=67688 this will answer all your questions about the 800 ,BTW : iv'e been riding this ski hard for 2 seasons without a burp ! 120 /troublefree hp .

 

[aqua]

if you do it you will have to let me ride it!! :naughty:

 

[WaveDemon]

I know the 1200 np fits too. a guy here in tampa has one with a blown motor. I think he's selling it.

 

[blaster800]

The easiest engine to transplant is the 1100 yammie 3 cyl 110 hp , its basically a drop in from what ive read in the past .

 

[WaveDemon]

The easiest engine to transplant is the 1100 yammie 3 cyl 110 hp , its basically a drop in from what ive read in the past .

the non powervalve 1200 is the same motor BTW.

 

[showmepro1200]

Thanks Blaster 800 that's exactly what i needed to hear, so from what i'm getting the yamaha 1100, and the 1200 w/o PV will just bolt right in? what about the yamaha 800 w/o PV and the 800 and 1200 with PV? thanks for all the help, god i love this B1. I'm still not very much in the hole $$$ wise. I baught this thing for $225 because the boat was pink from year of sun fading, nothing some rubbing compound won't take out. Anyway i love the boat and just want to beef it up a little. so thanks for all the great info.

 

[FLY6584]

the 1100/1200 definitely will not just drop right in. You need to move the front motor mounts forward to make it work. I believe blaster800 had to do this with his 800 also. If I remember correctly I believe actually heated up where the mounts where mounted to and removed them and then the mounted them furhur apart.

 

[FLY6584]

I also considered doing this a while back. I spoke to the guy that built that ski in Tampa and he said he charges about 2K in labor alone to do the conversion. He tried to explain to me how difficult of an undertaking it actually is.

It would be a cool project to do on your own. Just make sure you have plenty of time and patience.

 

[showmepro1200]

thanks for the advise.....now i'm not so sure......hmmmmm it's always a possability and with the winter coming soon, i should have plenty of time to do it if i want to.

 

[WaveDemon]

there is no non pv800

 

[showmepro1200]

oh, that was my mistake. Sorry, thanks for the correction. So, what would be an easier project with the best result.....i'm swaying between a PV 800 and a nonPV 1200???

 

[WaveDemon]

I think the np 1200 is easier and cheaper.

 

[showmepro1200]

what is the HP difference between the PV800 and the nonPV1200?

 

[FLY6584]

I think the np 1200 is easier and cheaper.

Yeah if I were to do a conversion I think I would also go with a np 1200.

 

[blaster800]

I do recall reading that the 1200 makes the blaster much heavier and thats something i personally dont want more of in my b-1 . NOTE : The 800pv makes more hp/ lb. than the 1200 in the stock version, 120 vs 135 . Here is what i have experienced for sure , if you want it for surf riding , wavejumping , where it has to be nimble and quick ,stay with the smaller size ''weight '' engines ''2 cyl '', if you want a flat water ripper/ throw a 1200 in it ,but dont forget the b-1 hull was never built for high speeds from the start , You have to decide what you want it for , In the last couple of weeks i have seen several nice 62t x 61x freestyle engines from reliable people on the boards , IMHO : sell the 1200 , get a ported 62t x 61x , b-pipe , high compression head , and a good prop and thats all a blaster really needs . If your not afraid of work do a 800 pv , I already did the legwork !

 

[Jetaddict]

I had the 1200 Blaster 1, and recently sold it to another forum member, who is resurrecting it (insert thunder and lightning sound and visual effects here).
After owning both the 1200 and the stock 701, I can offer a subjective opinion. The 1200 makes the B1 much heavier and much more unstable. If you have a hard time boarding a B1 in stock form, you will have a much harder time doing so with the 1200-especially in chop/surf.
The wave jumping capablity is stll pretty good- but you need to make sure the motor mounts are done RIGHT. The extra weight and torque will destroy shoddily installed/glassed mounts in a heartbeat. The mounts in my 1200 B1 were professionally done, glassed in deep, and looked OEM.
The holeshot and torque with the 1200 were incredible. The ski would pop out of the water and just screamed throughout the whole powerband.
To sum it up, keep the 701 or upgrade to a 760 for surf, freestyle stuff, and recreational riding. Throw the 1200 in it if you will be riding primarily on flat water and doing some mild jumping- definitely a racer. My brother in law had a stroker motor in his B1 with 760 cases, Riva pipe, and some other bolt-ons, and the thing was almost as fast as the 1200 because o the power-to-weight ratio. The 1200 I had was not a top-speed machine...I think it GPS'd out at 56mph...not fast compared to a lot of machines out there...but it stomped any boat out of the hole I came across. Once I hit the speed limit, I would get walked...but hey, that's not why I bought it.
I htink Blaster800 summed it up real well above. The 1200 is an awesome machine and definitely a conversation piece, but keep the weight down and you'll have a craft that maintains the integrity of what the B1 was really intended for.

 

[bad93blaster]

i know eric brigham had a 66e motor twin piped b1 at nationals ski ripped really well